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Author SHA1 Message Date
Damien Cassou
931653b99f
emacs: optionally start service with the session
Add services.emacs.startWithUserSession boolean to indicate that Emacs
must be started with the systemd user session. This is true by default
unless socket activation is also true.

In the past, the user had to choose between socket activation (to get
the Emacs service started when the user uses emacsclient) and
immediate start with the user session. When choosing immediate start
over socket activation and if the Emacs service is stopped at some
point, using emacsclient would start a new Emacs daemon but the
service would still be turned off. This situation would prevent
`home-manager switch` from completing successfully because it wouldn't
be able to start the Emacs service as Emacs is already running.

This new setting makes it possible to have both socket activation and
immediate start at the same time. In this scenario, Emacs is started
with the user session and, after the Emacs service is stopped, using
emacsclient starts the service again.

This new settings also makes it possible to have neither socket
activation nor immediate start.
2022-06-19 01:09:41 +02:00
rcerc
f3be3cda6a
services/emacs: add option to set emacsclient as the default editor (#2545)
* services/emacs: add `defaultEditor` option

Sets `emacsclient` as the default editor using the `EDITOR` environment variable.
2022-01-10 02:17:13 -05:00
schotts-fired
0f3dfc94ef
services.emacs: add option extraOptions
This is to allow adding command-line arguments to the Emacs daemon.
Previously only the Emacs client could be started with custom
arguments.
2021-10-02 23:28:22 +02:00
Rodney Lorrimar
5060262b79
services/emacs: Prevent deletion of socket file
When running a socket-activated emacs service, we don't want emacs to
remove the socket file after exiting, because then subsequent
invocations of `emacsclient` won't be able to use the socket to start
emacs.service again.
2021-06-06 01:00:20 +02:00
Tad Fisher
ac82c036d8
services/emacs: Update systemd definitions, drop Emacs 26 support
Emacs 27 added Type=notify support and updated the service definition to
remove the use of `emacsclient' to kill the service. Emacs 28 changes
the `StartupWMClass' in emacsclient.desktop to `Emacsd'. Update our
emacs.service and emacsclient.desktop definitions to match upstream
changes.

When killing emacs.service, the socket is removed, and subsequently
starting the service manually results in a service without a socket.
Prevent this by adding `RefuseManualStart=true' to the service's Unit
definition.

Drop Emacs 26 support as it is no longer shipped in nixpkgs. Update the
tests to verify the following configuration scenarios:

- Emacs version: 27, 28
- Socket activation: disabled, enabled
2021-06-06 01:00:19 +02:00
Robert Helgesson
18429f1d1d
emacs: remove use of makeDesktopItem
Can generate the file directly to avoid the dependency on the
`makeDesktopItem` API.
2020-10-22 22:00:22 +02:00
Tad Fisher
54b69d2ef8
emacs: fix service environment
Emacs populates 'exec-path' at launch from the 'PATH' environment
variable. Likewise, the emacs derivation from nixpkgs populates
'load-path' from the 'NIX_PROFILES' variable. As neither of these are
available by default in the systemd user manager, revert to the
previous behavior of launching the Emacs daemon from a login shell.

Fixes #1354
Fixes #1340
PR #1355
2020-06-24 22:50:30 +02:00
Tad Fisher
3815248786
emacs: Support socket activation via systemd
Add 'services.emacs.socketActivation.enable' for generating an
'emacs.socket' systemd unit.

Emacs since version 26 has supported socket activation, whereby an
external process manager such as systemd listens on a socket and passes
it to the Emacs daemon when the manager launches it. This improves
startup time of the user session and avoids launching the daemon when not
needed, for example when launching the user session via SSH.

This implementation hard-codes the socket path to the default for the
version of 'programs.emacs.finalPackage', because systemd does not
perform shell expansion in the socket unit's 'ListenStream' parameter
and it seems like an advanced use-case to change the socket path. Shell
expansion would be desirable as the socket path usually resides in
directories such as $XDG_RUNTIME_DIR or $TMPDIR.

Tests were added to verify behavior in the following cases:

- Emacs service with socket activation disabled
- Emacs 26 with socket activation enabled
- Emacs 27 with socket activation enabled

PR #1314
2020-06-11 20:39:49 +02:00